Hi guys cheers for input, I cleaned the idle control valve this morning and didn't have much of a change, I think will buy a new 1 see if that helps, also trying to hunt a standard airbox down. Zippyobrien u said you had same problem, did yours have decat and 4branch manifold? A friend had told me this could be my problem because of lambda sensor ? So many different ideas I'm sort of lost. Is re-mapping the ecu my best bet if I want to keep these mods?